摘要目的　旨在检测成年大鼠脊髓损伤后室管膜细胞的增殖反应以及nestin的表达。方法　应用动脉瘤夹压迫建立大鼠脊髓损伤模型，通过组织病理学及免疫组织化学方法检测不同时段室管膜细胞的反应性增生和神经外胚层多潜能细胞特异性抗原nestin的表达。结果　损伤后24小时可以观测到室管膜细胞nestin表达明显升高，增殖细胞核抗原（PCNA）呈阳性；7天后见室管膜细胞显著增生；nestin的表达随时间进展呈下调。结论　正常情况下静止的室管膜细胞在脊髓损伤后表现出胚胎期原始细胞的增殖状态。

abstractsObjective To determine cell proliferation and nestin expression in the ependyma of adult rat spinal cord after injury. Methods Rat spinal cord injury models were established by aneurysm clip compression, and nestin expression and proliferation of ependymal cells at different times were shown with pathological and immuno-histochemical staining. Results Ependymal cells adjacent to the injured site demonstrated a dramatic increase in nestin expression 24 hours after compression. Proliferating cell nuclear antigen was positive, and significant proliferation was observed after 7 days. Nestin expression was down regulated as time went by. Conclusion Normally quiescent mature ependymal cells appear to revert to an embryonic state in response to spinal cord injury.